package com.imooc.netty;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.ServerChannel;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;

/*
    实现客户端发送一个请求,服务器会返回一个hello netty
 */
public class HelloServer {

    public static void main(String[] args) throws Exception{
        //定义一对线程组
        //主线程组,用于接受客户端的连接,但是不做任何处理,向老板一样,不做事
        EventLoopGroup bossGroup= new NioEventLoopGroup();
        //从线程组,老板线程组会把任务丢给他,让手下线程组去做任务
        EventLoopGroup workerGroup= new NioEventLoopGroup();
        try{
            //netty服务器的创建,ServerBootstrap是一个启动类
            ServerBootstrap serverBootstrap =new ServerBootstrap();
            serverBootstrap.group(bossGroup,workerGroup)    //设置主从线程组
                    .channel(NioServerSocketChannel.class)  //设置nio的双向通道
                    .childHandler(new HelloServerInitializer());                                //子处理器,用于处理workerGroup
            //启动server,并且设置8088为启动的端口号,同时启动方式为同步
            ChannelFuture channelFuture= serverBootstrap.bind(8088).sync();
            //监听关闭的channel,设置为同步方式
            channelFuture.channel().closeFuture().sync();
        }finally {
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }

    }
}
